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T. W. BROWN..

COFFEE MILL.

N5. 105,545. Patented July 19, i870.

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` tnited gatita @wat @time 'THOM- ASW BROWN, OF BOSTON, MASSACHUSETTS, ASSIGN OR TO CHARLES PARKER, OE MERIDEN, CONNECTICUT.

' Letters Patent No. 105,545, dated July 19, 1870.

To all whom it. mail concern.-

Be' it known that I, THOMAS W. BROWN, of Boston, in thecounty of Sulolk and State of Massachu-- setts, have invented a new Improvement in Coilee- Mills; and I dohe1'ehy declare the ibllcwing, when taken in connection withthe accompanying'drawings and the letters of reference marked thereon, to be a full, clear, and exact description ot' the same, and which said drawings constitute part of thisspeciiication, and represent, in

Figure 1, a side View, and in Figure 2., a vertical cent-ral section.

l This invention vrelates tob an improvement in that class ot'- grinding mills connnonlyused for Agrinding coffee, the object being a cheap and durable4 mill; and: The invention consists in forming the base or receptacle of.the mill', the runnerlchamber, and centcrsupportin the hopper, in one and the samepiece, whether the hopper be also cast thereon or formed in an independent piece.

A is the bottom, towhch the mill is fixed.

B, the base or receiving-box.

O, the runner-chamber.

D, the 4central support, which extends up into the `hopper E, and with oneor more recesses, d, therethrough, to permit the material to be ground to pass in the runner-chamber.

lhe base B, runnerchamber'(3,'andcentral sup` port D, are cast in one and the same piece, and, by preference, I cast the hopper on the same piece.

`flhecentral support D is formed of conical shape, so as to form a chamber above the runner F, the said or without the hopper E.

runner being fixed to a spindle,`G, to which a crank, H, is applied, by means ot' which the runner is turned.

is a step, fixed to the hase, so as to form an opening upon the underside, within which thc head L oi' the adjustingscrew may stand, so that, from the underside of the mill, the adjusting-screw may be turned. l

Upon thegend of the adjusting-screw the spindle G rests, as seen infig.- 2?., vThisarrangement ,of thestep obviates a diiculty experienced inthe adjustment of vertical mills, inasmuch as there is no liability to get out of order, and is easily accessible.

I `forni an opening through one side of the base,

into which I fix a slide, n, as seen in iig. 1, through 4which the material ground may be removed.

The runner and runner-chamber are-.constructed iu the usual manner, but, by combining-the three parts, B, C, and D, in one andthe same piece of' casting,

.the construction is very much simplified, and, consequently, the cost'of manufacture greatly reduced, and stl more so 'when the'hopper is cast in the same piece with the parts B, C, and D. In some cases a brass .or copper hopper is preferred to iron, and in such cases the hopper may be formed separately, and securedv to the runner-chamber. I claim as my invention- The combination ofvthe hase B, runner-chamber O,

and central support D, castrin one and the same piece of metal, with the vertical runner F, and either with.

Witnesses: y THOMAS W. BROWN.

Taos. F.- BRENT, v N. H. CAMP. 

